1 /* Copyright (c) 2014-2016. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/kernel/routing/DragonflyZone.hpp"
7 #include "src/kernel/routing/NetPoint.hpp"
8 #include "src/surf/network_interface.hpp"
10 #include <boost/algorithm/string/classification.hpp>
11 #include <boost/algorithm/string/split.hpp>
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_cluster_dragonfly, surf_route_cluster, "Dragonfly Routing part of surf");
20 DragonflyZone::DragonflyZone(NetZone* father, const char* name) : ClusterZone(father, name)
24 DragonflyZone::~DragonflyZone()
26 if (this->routers_ != nullptr) {
27 for (unsigned int i = 0; i < this->numGroups_ * this->numChassisPerGroup_ * this->numBladesPerChassis_; i++)
33 unsigned int* DragonflyZone::rankId_to_coords(int rankId)
35 // coords : group, chassis, blade, node
36 unsigned int* coords = new unsigned int[4];
37 coords[0] = rankId / (numChassisPerGroup_ * numBladesPerChassis_ * numNodesPerBlade_);
38 rankId = rankId % (numChassisPerGroup_ * numBladesPerChassis_ * numNodesPerBlade_);
39 coords[1] = rankId / (numBladesPerChassis_ * numNodesPerBlade_);
40 rankId = rankId % (numBladesPerChassis_ * numNodesPerBlade_);
41 coords[2] = rankId / numNodesPerBlade_;
42 coords[3] = rankId % numNodesPerBlade_;
47 void DragonflyZone::parse_specific_arguments(sg_platf_cluster_cbarg_t cluster)
49 std::vector<std::string> parameters;
50 std::vector<std::string> tmp;
51 boost::split(parameters, cluster->topo_parameters, boost::is_any_of(";"));
53 // TODO : we have to check for zeros and negative numbers, or it might crash
54 if (parameters.size() != 4) {
56 "Dragonfly are defined by the number of groups, chassis per groups, blades per chassis, nodes per blade");
59 // Blue network : number of groups, number of links between each group
60 boost::split(tmp, parameters[0], boost::is_any_of(","));
61 if (tmp.size() != 2) {
62 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
65 this->numGroups_ = xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
66 this->numLinksBlue_ = xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the blue level: %s");
68 // Black network : number of chassis/group, number of links between each router on the black network
69 boost::split(tmp, parameters[1], boost::is_any_of(","));
70 if (tmp.size() != 2) {
71 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
74 this->numChassisPerGroup_ = xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
75 this->numLinksBlack_ = xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the black level: %s");
77 // Green network : number of blades/chassis, number of links between each router on the green network
78 boost::split(tmp, parameters[2], boost::is_any_of(","));
79 if (tmp.size() != 2) {
80 surf_parse_error("Dragonfly topologies are defined by 3 levels with 2 elements each, and one with one element");
83 this->numBladesPerChassis_ = xbt_str_parse_int(tmp[0].c_str(), "Invalid number of groups: %s");
84 this->numLinksGreen_ = xbt_str_parse_int(tmp[1].c_str(), "Invalid number of links for the green level: %s");
86 // The last part of topo_parameters should be the number of nodes per blade
87 this->numNodesPerBlade_ =
88 xbt_str_parse_int(parameters[3].c_str(), "Last parameter is not the amount of nodes per blade: %s");
89 this->cluster_ = cluster;
93 * Generate the cluster once every node is created
95 void DragonflyZone::seal()
97 if (this->numNodesPerBlade_ == 0) {
101 this->generateRouters();
102 this->generateLinks();
105 DragonflyRouter::DragonflyRouter(int group, int chassis, int blade) : group_(group), chassis_(chassis), blade_(blade)
109 DragonflyRouter::~DragonflyRouter()
111 if (this->myNodes_ != nullptr)
113 if (this->greenLinks_ != nullptr)
114 xbt_free(greenLinks_);
115 if (this->blackLinks_ != nullptr)
116 xbt_free(blackLinks_);
117 if (this->blueLinks_ != nullptr)
118 xbt_free(blueLinks_);
121 void DragonflyZone::generateRouters()
123 this->routers_ = static_cast<DragonflyRouter**>(xbt_malloc0(this->numGroups_ * this->numChassisPerGroup_ *
124 this->numBladesPerChassis_ * sizeof(DragonflyRouter*)));
126 for (unsigned int i = 0; i < this->numGroups_; i++) {
127 for (unsigned int j = 0; j < this->numChassisPerGroup_; j++) {
128 for (unsigned int k = 0; k < this->numBladesPerChassis_; k++) {
129 DragonflyRouter* router = new DragonflyRouter(i, j, k);
130 this->routers_[i * this->numChassisPerGroup_ * this->numBladesPerChassis_ + j * this->numBladesPerChassis_ +
137 void DragonflyZone::createLink(std::string id, int numlinks, surf::LinkImpl** linkup, surf::LinkImpl** linkdown)
141 LinkCreationArgs linkTemplate;
142 linkTemplate.bandwidth = this->cluster_->bw * numlinks;
143 linkTemplate.latency = this->cluster_->lat;
144 linkTemplate.policy = this->cluster_->sharing_policy; // sthg to do with that ?
145 linkTemplate.id = id;
146 sg_platf_new_link(&linkTemplate);
147 XBT_DEBUG("Generating link %s", id.c_str());
148 surf::LinkImpl* link;
150 if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX) {
151 tmpID = linkTemplate.id + "_UP";
152 link = surf::LinkImpl::byName(tmpID.c_str());
153 *linkup = link; // check link?
154 tmpID = linkTemplate.id + "_DOWN";
155 link = surf::LinkImpl::byName(tmpID.c_str());
156 *linkdown = link; // check link ?
158 link = surf::LinkImpl::byName(linkTemplate.id.c_str());
164 void DragonflyZone::generateLinks()
166 static int uniqueId = 0;
167 surf::LinkImpl* linkup;
168 surf::LinkImpl* linkdown;
170 unsigned int numRouters = this->numGroups_ * this->numChassisPerGroup_ * this->numBladesPerChassis_;
172 if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX)
173 numLinksperLink_ = 2;
175 // Links from routers to their local nodes.
176 for (unsigned int i = 0; i < numRouters; i++) {
177 // allocate structures
178 this->routers_[i]->myNodes_ = static_cast<surf::LinkImpl**>(
179 xbt_malloc0(numLinksperLink_ * this->numNodesPerBlade_ * sizeof(surf::LinkImpl*)));
180 this->routers_[i]->greenLinks_ =
181 static_cast<surf::LinkImpl**>(xbt_malloc0(this->numBladesPerChassis_ * sizeof(surf::LinkImpl*)));
182 this->routers_[i]->blackLinks_ =
183 static_cast<surf::LinkImpl**>(xbt_malloc0(this->numChassisPerGroup_ * sizeof(surf::LinkImpl*)));
185 for (unsigned int j = 0; j < numLinksperLink_ * this->numNodesPerBlade_; j += numLinksperLink_) {
186 std::string id = "local_link_from_router_"+ std::to_string(i) + "_to_node_" +
187 std::to_string(j / numLinksperLink_) + "_" + std::to_string(uniqueId);
188 this->createLink(id, 1, &linkup, &linkdown);
190 if (this->cluster_->sharing_policy == SURF_LINK_FULLDUPLEX) {
191 this->routers_[i]->myNodes_[j] = linkup;
192 this->routers_[i]->myNodes_[j + 1] = linkdown;
194 this->routers_[i]->myNodes_[j] = linkup;
200 // Green links from routers to same chassis routers - alltoall
201 for (unsigned int i = 0; i < this->numGroups_ * this->numChassisPerGroup_; i++) {
202 for (unsigned int j = 0; j < this->numBladesPerChassis_; j++) {
203 for (unsigned int k = j + 1; k < this->numBladesPerChassis_; k++) {
204 std::string id = "green_link_in_chassis_" + std::to_string(i % numChassisPerGroup_) +"_between_routers_" +
205 std::to_string(j) + "_and_" + std::to_string(k) + "_" + std::to_string(uniqueId);
206 this->createLink(id, this->numLinksGreen_, &linkup, &linkdown);
208 this->routers_[i * numBladesPerChassis_ + j]->greenLinks_[k] = linkup;
209 this->routers_[i * numBladesPerChassis_ + k]->greenLinks_[j] = linkdown;
215 // Black links from routers to same group routers - alltoall
216 for (unsigned int i = 0; i < this->numGroups_; i++) {
217 for (unsigned int j = 0; j < this->numChassisPerGroup_; j++) {
218 for (unsigned int k = j + 1; k < this->numChassisPerGroup_; k++) {
219 for (unsigned int l = 0; l < this->numBladesPerChassis_; l++) {
220 std::string id = "black_link_in_group_" + std::to_string(i) + "_between_chassis_" + std::to_string(j) +
221 "_and_" + std::to_string(k) +"_blade_" + std::to_string(l) + "_" + std::to_string(uniqueId);
222 this->createLink(id, this->numLinksBlack_, &linkup, &linkdown);
224 this->routers_[i * numBladesPerChassis_ * numChassisPerGroup_ + j * numBladesPerChassis_ + l]
225 ->blackLinks_[k] = linkup;
226 this->routers_[i * numBladesPerChassis_ * numChassisPerGroup_ + k * numBladesPerChassis_ + l]
227 ->blackLinks_[j] = linkdown;
234 // Blue links between groups - Not all routers involved, only one per group is linked to others. Let's say router n of
235 // each group is linked to group n.
236 // FIXME: in reality blue links may be attached to several different routers
237 for (unsigned int i = 0; i < this->numGroups_; i++) {
238 for (unsigned int j = i + 1; j < this->numGroups_; j++) {
239 unsigned int routernumi = i * numBladesPerChassis_ * numChassisPerGroup_ + j;
240 unsigned int routernumj = j * numBladesPerChassis_ * numChassisPerGroup_ + i;
241 this->routers_[routernumi]->blueLinks_ = static_cast<surf::LinkImpl**>(xbt_malloc0(sizeof(surf::LinkImpl*)));
242 this->routers_[routernumj]->blueLinks_ = static_cast<surf::LinkImpl**>(xbt_malloc0(sizeof(surf::LinkImpl*)));
243 std::string id = "blue_link_between_group_"+ std::to_string(i) +"_and_" + std::to_string(j) +"_routers_" +
244 std::to_string(routernumi) + "_and_" + std::to_string(routernumj) + "_" + std::to_string(uniqueId);
245 this->createLink(id, this->numLinksBlue_, &linkup, &linkdown);
247 this->routers_[routernumi]->blueLinks_[0] = linkup;
248 this->routers_[routernumj]->blueLinks_[0] = linkdown;
254 void DragonflyZone::getLocalRoute(NetPoint* src, NetPoint* dst, sg_platf_route_cbarg_t route, double* latency)
256 // Minimal routing version.
257 // TODO : non-minimal random one, and adaptive ?
259 if (dst->isRouter() || src->isRouter())
262 XBT_VERB("dragonfly getLocalRout from '%s'[%d] to '%s'[%d]", src->name().c_str(), src->id(), dst->name().c_str(),
265 if ((src->id() == dst->id()) && hasLoopback_) {
266 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = privateLinks_.at(src->id() * linkCountPerNode_);
268 route->link_list->push_back(info.first);
270 *latency += info.first->latency();
274 unsigned int* myCoords = rankId_to_coords(src->id());
275 unsigned int* targetCoords = rankId_to_coords(dst->id());
276 XBT_DEBUG("src : %u group, %u chassis, %u blade, %u node", myCoords[0], myCoords[1], myCoords[2], myCoords[3]);
277 XBT_DEBUG("dst : %u group, %u chassis, %u blade, %u node", targetCoords[0], targetCoords[1], targetCoords[2],
280 DragonflyRouter* myRouter = routers_[myCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) +
281 myCoords[1] * numBladesPerChassis_ + myCoords[2]];
282 DragonflyRouter* targetRouter = routers_[targetCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) +
283 targetCoords[1] * numBladesPerChassis_ + targetCoords[2]];
284 DragonflyRouter* currentRouter = myRouter;
286 // node->router local link
287 route->link_list->push_back(myRouter->myNodes_[myCoords[3] * numLinksperLink_]);
289 *latency += myRouter->myNodes_[myCoords[3] * numLinksperLink_]->latency();
291 if (hasLimiter_) { // limiter for sender
292 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = privateLinks_.at(src->id() * linkCountPerNode_ + hasLoopback_);
293 route->link_list->push_back(info.first);
296 if (targetRouter != myRouter) {
298 // are we on a different group ?
299 if (targetRouter->group_ != currentRouter->group_) {
300 // go to the router of our group connected to this one.
301 if (currentRouter->blade_ != targetCoords[0]) {
302 // go to the nth router in our chassis
303 route->link_list->push_back(currentRouter->greenLinks_[targetCoords[0]]);
305 *latency += currentRouter->greenLinks_[targetCoords[0]]->latency();
306 currentRouter = routers_[myCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) +
307 myCoords[1] * numBladesPerChassis_ + targetCoords[0]];
310 if (currentRouter->chassis_ != 0) {
311 // go to the first chassis of our group
312 route->link_list->push_back(currentRouter->blackLinks_[0]);
314 *latency += currentRouter->blackLinks_[0]->latency();
315 currentRouter = routers_[myCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) + targetCoords[0]];
318 // go to destination group - the only optical hop
319 route->link_list->push_back(currentRouter->blueLinks_[0]);
321 *latency += currentRouter->blueLinks_[0]->latency();
322 currentRouter = routers_[targetCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) + myCoords[0]];
325 // same group, but same blade ?
326 if (targetRouter->blade_ != currentRouter->blade_) {
327 route->link_list->push_back(currentRouter->greenLinks_[targetCoords[2]]);
329 *latency += currentRouter->greenLinks_[targetCoords[2]]->latency();
330 currentRouter = routers_[targetCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) + targetCoords[2]];
333 // same blade, but same chassis ?
334 if (targetRouter->chassis_ != currentRouter->chassis_) {
335 route->link_list->push_back(currentRouter->blackLinks_[targetCoords[1]]);
337 *latency += currentRouter->blackLinks_[targetCoords[1]]->latency();
338 currentRouter = routers_[targetCoords[0] * (numChassisPerGroup_ * numBladesPerChassis_) +
339 targetCoords[1] * numBladesPerChassis_ + targetCoords[2]];
343 if (hasLimiter_) { // limiter for receiver
344 std::pair<surf::LinkImpl*, surf::LinkImpl*> info = privateLinks_.at(dst->id() * linkCountPerNode_ + hasLoopback_);
345 route->link_list->push_back(info.first);
348 // router->node local link
349 route->link_list->push_back(targetRouter->myNodes_[targetCoords[3] * numLinksperLink_ + numLinksperLink_ - 1]);
351 *latency += targetRouter->myNodes_[targetCoords[3] * numLinksperLink_ + numLinksperLink_ - 1]->latency();
354 delete[] targetCoords;